What does diagonal mean?

Definitions for diagonal
daɪˈæg ə nl, -ˈæg nldi·ag·o·nal

This dictionary definitions page includes all the possible meanings, example usage and translations of the word diagonal.

Princeton's WordNet

  1. diagonalnoun

    (geometry) a straight line connecting any two vertices of a polygon that are not adjacent

  2. diagonal, biasnoun

    a line or cut across a fabric that is not at right angles to a side of the fabric

  3. diagonalnoun

    an oblique line of squares of the same color on a checkerboard

    "the bishop moves on the diagonals"

  4. diagonalnoun

    (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry

  5. solidus, slash, virgule, diagonal, stroke, separatrixadjective

    a punctuation mark (/) used to separate related items of information

  6. diagonaladjective

    connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face

    "a diagonal line across the page"

  7. aslant, aslope, diagonal, slanted, slanting, sloped, slopingadjective

    having an oblique or slanted direction


  1. diagonalnoun

    something arranged diagonally or obliquely

  2. diagonalnoun

    a line or cut across a fabric that is not at right angles to a side of the fabric

  3. diagonalnoun

    a punctuation mark used to separate related items of information

  4. diagonalnoun

    a diagonal line or plane

  5. diagonalnoun

    a line joining non-adjacent vertices of a polygon.

  6. diagonaladjective

    Joining two nonadjacent vertices (of a polygon or polyhedron).

  7. diagonaladjective

    Having a slanted or oblique direction, lines or markings.

  8. diagonaladjective

    Pertaining to the front left and back right (or the front right and back left) legs of a quadruped.

  9. Etymology: From diagonalis, from διαγώνιος, from διά + γωνία.

Samuel Johnson's Dictionary

  1. DIAGONALadjective

    Reaching from one angle to another, so as to divide a parallelogram into equal parts.

    Etymology: διαγώνιος.

    The monstrosity of the badger is ill-contrived, and with some disadvantage; the shortness being fixed unto the legs of one side, that might have been more properly placed upon the diagonal movers. Thomas Browne, Vulgar Errours, b. iii. c. 5.

    This, and all like sorts of stone that are composed of granules, will cut and rive in any direction, as well in a perpendicular, or in a diagonal, as horizontally and parallel to the side of the strata. John Woodward, on Fossils.

  2. Diagonalnoun

    A line drawn from angle to angle, and dividing a square into equal parts.

    Etymology: from the adjective.

    When a man has in his mind the idea of two lines, viz. the side and diagonal of a square, whereof the diagonal is an inch long, he may have the idea also of the division of that line into a certain number of equal parts. John Locke.


  1. diagonal

    A diagonal is a line segment that connects two non-adjacent vertices in a polygon, polyhedron, or any multi-dimensional geometric shape. In other words, it is the line linking two corners of a shape that is not part of its edge or base. In matrices, a diagonal refers to elements that are located from the top left to the bottom right.

Webster Dictionary

  1. Diagonaladjective

    joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides

  2. Diagonalnoun

    a right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts

  3. Diagonalnoun

    a member, in a framed structure, running obliquely across a panel

  4. Diagonalnoun

    a diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving

  5. Etymology: [L. diagonalis, fr. Gr. from to angle; dia` through + an angle; perh. akin to E. knee: cf. F. diagonal.]


  1. Diagonal

    A diagonal is a line joining two nonconsecutive vertices of a polygon or polyhedron. Informally, any sloping line is called diagonal. The word "diagonal" derives from the ancient Greek διαγώνιος diagonios, "from angle to angle"; it was used by both Strabo and Euclid to refer to a line connecting two vertices of a rhombus or cuboid, and later adopted into Latin as diagonus. In mathematics, in addition to its geometric meaning, a diagonal is also used in matrices to refer to a set of entries along a diagonal line.

Chambers 20th Century Dictionary

  1. Diagonal

    dī-ag′o-nal, adj. through the corners, or from an angle to an opposite angle of a four or many sided figure.—n. a straight line so drawn.—adv. Diag′onally.—Diagonal scale, a scale for laying down small fractions of the unit of measurement, the parallel lines drawn lengthwise on its surface being divided into sections by lines drawn crosswise, and in one end section being intersected by a series of other parallel lines drawn obliquely at equal distances across them. [Fr.,—L. diagonalis, from Gr. diagōniosdia, through, and gōnia, a corner.]

Anagrams for diagonal »

  1. ganoidal

  2. gonadial

How to pronounce diagonal?

How to say diagonal in sign language?


  1. Chaldean Numerology

    The numerical value of diagonal in Chaldean Numerology is: 7

  2. Pythagorean Numerology

    The numerical value of diagonal in Pythagorean Numerology is: 9

Examples of diagonal in a Sentence

  1. Adam Pelech:

    For the first score, New Yorks Anders Lee skated into an opening on the right side of the net and tapped New Yorks Anders Lee stick to get the puck. Adam Pelech perfectly placed a diagonal pass on New Yorks Anders Lee stick and Adam Pelech pushed it in to put New York ahead 1-0 with 5:10 left in the opening period. Adam Pelech put Adam Pelech in a great spot just had to get it to Adam Pelech.

  2. Hal Buell:

    Like any good, experienced and talented photographer, there's a sense of anticipation and a sense of shooting a picture at peak action -- and Joe got it, you couldn't have captured the action at a better peak. A moment earlier, and the flag would have been too low. If it had been a second later, the flag's staff would have been straight up and the photo wouldn't have had that strong diagonal line.

  3. Hal Buell:

    It's exquisite, you have this strong, diagonal line made by the flag staff. You have the flag snapping in the breeze. You have the pyramid-like shape of the Marines pushing the flag up. The men obviously are separate, but they appear as one. The blank background enhances the action by providing no distractions. Also, the photo is gifted with a softly filtered light. A very thin haze of clouds filters the light so that the shadows aren't harsh, but there is detail in all the shadows on the uniforms and the flag.

Popularity rank by frequency of use


Translations for diagonal

From our Multilingual Translation Dictionary

Get even more translations for diagonal »


Find a translation for the diagonal definition in other languages:

Select another language:

  • - Select -
  • 简体中文 (Chinese - Simplified)
  • 繁體中文 (Chinese - Traditional)
  • Español (Spanish)
  • Esperanto (Esperanto)
  • 日本語 (Japanese)
  • Português (Portuguese)
  • Deutsch (German)
  • العربية (Arabic)
  • Français (French)
  • Русский (Russian)
  • ಕನ್ನಡ (Kannada)
  • 한국어 (Korean)
  • עברית (Hebrew)
  • Gaeilge (Irish)
  • Українська (Ukrainian)
  • اردو (Urdu)
  • Magyar (Hungarian)
  • मानक हिन्दी (Hindi)
  • Indonesia (Indonesian)
  • Italiano (Italian)
  • தமிழ் (Tamil)
  • Türkçe (Turkish)
  • తెలుగు (Telugu)
  • ภาษาไทย (Thai)
  • Tiếng Việt (Vietnamese)
  • Čeština (Czech)
  • Polski (Polish)
  • Bahasa Indonesia (Indonesian)
  • Românește (Romanian)
  • Nederlands (Dutch)
  • Ελληνικά (Greek)
  • Latinum (Latin)
  • Svenska (Swedish)
  • Dansk (Danish)
  • Suomi (Finnish)
  • فارسی (Persian)
  • ייִדיש (Yiddish)
  • հայերեն (Armenian)
  • Norsk (Norwegian)
  • English (English)

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:


Use the citation below to add this definition to your bibliography:


"diagonal." Definitions.net. STANDS4 LLC, 2024. Web. 23 Apr. 2024. <https://www.definitions.net/definition/diagonal>.

Discuss these diagonal definitions with the community:


    Are we missing a good definition for diagonal? Don't keep it to yourself...

    Image or illustration of


    Credit »

    Free, no signup required:

    Add to Chrome

    Get instant definitions for any word that hits you anywhere on the web!

    Free, no signup required:

    Add to Firefox

    Get instant definitions for any word that hits you anywhere on the web!

    Browse Definitions.net


    Are you a words master?

    a textile machine for weaving yarn into a textile
    A abase
    B loom
    C scarper
    D denudate

    Nearby & related entries:

    Alternative searches for diagonal: